*{
  margin: 0;
  box-sizing: border-box;
}

ul{
  padding: 0;
  list-style: none;
}

a{
  text-decoration: none;
  color: #333;
}

img{
  width: 100%;
}

h4{
  font-weight: normal;
}

.clearfix::after{
  content: "";
  display: block;
  clear: both;
}

.courses-wrap{
  width: 1200px;
  margin: 100px auto;
}

.course-tab{
  height: 52px;
  padding-left: 30px;
  margin-bottom: 20px;
  border: 1px solid #efefef;
  background-color: #f5f5f5;
}

.course-tab .tab-item{
  float: left;
  height: 50px;
  margin-right: 40px;
  line-height: 50px;
}

.course-tab .course-tab-lk{
  font-size: 14px;
}

.course-tab .course-tab-lk.current{
  color: #167ed9;
}


.course-card-list-wrap{
  width: 1200px;
  height: 500px;
  /* border: 1px solid red; */
}

.course-card-list-wrap .course-card-list{
  width: 1230px;
  height: 500px;
  margin-left: -18px;
}

.course-card-list-wrap .card-item{
  float: left;
  width: 236px;
  height: 221px;
  margin: 0 0 20px 9px;
  padding: 7px 7px 10px 7px;
  border: 1px solid #fff;
}

.course-card-list-wrap .card-item:hover{
  border-color:#ddd;
  box-shadow: 1px 1px 2px 1px #ececec;
}

.course-card-list-wrap .card-item .img-lk{
  display: block;
  width: 220px;
  height: 124px;
  margin-bottom: 6px;
}

.course-card-list-wrap .card-item .item-status{
  position: relative;
  z-index: 1;
  margin-top: -30px;
  height: 24px;
  background-color: rgba(0, 0, 0, .5);
  line-height: 24px;
  color: #fff;
  font-size: 12px;
}

.course-card-list-wrap .card-item .item-status .item-status-text{
  margin-left: 2px;
}

.course-card-list-wrap .card-item .item-tt{
  height: 40px;
  margin: 3px 0 8px 0;
}

.course-card-list-wrap .card-item .item-tt .tt-lk{
  font-size: 14px;
}

.course-card-list-wrap .card-item .item-tt .tt-lk:hover{
  color: #23b8ff;
}

.course-card-list-wrap .card-item .item-line{
  height: 24px;
}

.course-card-list-wrap .card-item .item-line .item-price{
  font-size: 14px;
}

.course-card-list-wrap .card-item .item-line .item-price.free{
  color: #5fb41b;
}

.course-card-list-wrap .card-item .item-line .item-price.vip{
  color: #e85308;
}

.course-card-list-wrap .card-item .item-line .item-info{
  float: right;
  margin-top: 3px;
  font-size: 12px;
  color: #999;
}







